Valve-gear for duplex steam-pumps



(No Model.)

0. M MILLER.

VALVE GEAR FOR DUPLEX STEAM PUMPS.

No. 399,203. Patented Mar. 5, 1889.

:1: ATTORNEY,

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Stains FATENT @lrricit,

( ASSIUS M. 'IHL'LER, OF CAN"ON, OlliO.

VALVE-GEAR FOR DUPLEX STEAlVl PUlVlPS.

SPECIFICATION forming part of Letters Patent No. 899,203, dated March 5, 1889.

Application filed April 4, 1888. Serial No. 269,537. (No model.)

To all (LZLOWL it nmy concern.-

lie it known that I, (AssIUs )L MILLER, a citizen of the United States, and a resident of Canton, county of Stark, State of Ohio, have invented a new and useful Improvement in Yalve- Gear for Duplex Steam -Pumps, of which the following is a full, clear, and exact description, reference being had to the ae conuiiauying drawings, making part of this specification.

)ly invention relates to an improvement in valve-gear for duplex steam-pumps; and it consists in providing means by which the piston of one engine may actuate the steamvalve of the other, and for securing the parts in position and adjustment and for taking up lost motion caused by wear.

With these objects in view my invention consists of the hcreinatter-described detail and combination of parts, as set forth in the claims.

liigurc .l is a side elevation of a duplex s1 cam-pump illustrating my invention. Fig. 2 is a vertical transverse section on a line from to and Fig. 23 is an isometrical view of a loop on the end of valve-stem, hereinafter explained.

Similar letters of reference indicate corresponding parts in all of the figures of the drawings.

A represents one of a pair of twin steamcylinders placed side by side and, in this case, integral with the frame l; and pump-cylinder L. The steam-cylinder and its ports are of the usual l'orm, having a centrally-located vnlvescat on which is placed a slide-valve of the usual [form and adapted to said seat, over which is placed the steam-chest D, said chest covering the valve-scat of both engines, and having an overhung or inwardly-projectcd portion, E, as a support for the valve-rods F.

()n the top ot the main frame 1; is mounted a valvegearsupporting frame, G, having threaded mrforations u, in which is fitted threaded pins Z),havingconical inner ends, as (I. ()n the outer end of said pins is provided a transverse groove, as c, and a check-nut, f.

Rock-shafts ll and .I are provided, having conical depressions h, (ZOl'l'QSllOliCllllg with the conical ends of the pins b and centrally lo cated in the ends of the said shafts, one being shown in cachet the shafts. Shaft H is further provided with an outwardly and downwardly projected arm, K, the lower end of which is adapted for engagement with a clip, L, secured to the piston-rod M, and ashort depending finger, 7.7, projected into and adapted to engage the ends Z in of a loop, N. Shaft J is also provided with an outwardly and downwardly projected arm, 0, the lower end of which is adapted for engagement with a clip, L, secured to the piston-rod Ill, and an upwardly-proj ected linger, 1'1, adapted for engagement with the ends Z or of a loop, N.

The shafts II J are placed between the vertical sides of the frame G and supported on the conical pins 1), as shown, the pin having been turned in with an ordinary screw-driver set in the groove 6. Said pins may be so turned in or out to carry the shaft into proper adjustment, and when. so placed may be secured in such desired adj ustment by the set-nuts f being turned onto the ends of the said pins and against the frame.

In this case it will be noticed that the lower ends of the arms K and O are bifurcated, the prongs p and q embracing the clip L, and that the shafts ll and .l may be adjusted transversely to the piston-rod )l M, so as to bring the arms K and into a proper working alignment with the movement of the piston and clip L. An oil-duvct, 2 1's provided in the rockshafts H and J, connecting the depression h, and a perforation, s, by which oil may be conducted from the surface of the shaft to the ductr, through which oil may be conducted to the conical depressions, and pins (7-, by which the parts may be lubricated The forward movement of the arm K by the piston M will move the valve to which it is geared in the same direction of the piston, the linger it pressing against the outer end of the loop N, while the outer movement of the arm 0 will move the valve to which it is geared in an opposite direction, and by this interchanging of the movement a continuous reciprocating movement of the steam valves and pistons is secured.

Having thus fully described the nature and object of my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination, with the piston-rods M M and frame G, of the actuating-arms O K, rock-shafts ll I, supported on. adjustal'ile conical pins 11, fingers 7; n, loops N, and Valve-stem In testimony whereof I have hereunto set support E, substantially as described, and for in y hand this 24th day of March, A. D. 1888. 10 the purpose set forth.

2. The combination, with the frame G, of the OASSIUS M. MILLER. 5 rook-shafts H and J, having oil-duets r and s,

conic-a1 depression 72, pins (1, and fingers 7e and Vitnesses: msubstantialiy as described, and for the pur- \V. K. MILLER, pose set forth. CHAS. R. MILLER.

J i i 

